I reckon, unless you are looking for the uber-cheese power list, just play the units you like the look of. I personally have a mix of Paladins, GKT, SS & IS. Occasionally using a small Purifier or Purgation squad for the fun of it. I try to play from a fun perspective, although my 2000 point foot slogging list ate daemons 2 games on the trot last night, so you should always have an advantage against them.

Maybe take the interceptor squad 10 strong and combat squad it. Give a demi-squad two incinerators and keep the other half back for objective grabbing if you think that will work out for you.

They're expensive, but everything is. I warp shunted and killed an entire squad of looters with a single incinerator in the squad today, with two you'll kill most anything without a 3+ armour save. It's expensive, but the high chance of assassinating T3 HQ choices and heavy support may be worth it.

Teleporting up to the rear armour of a tank/ artillery piece makes gives you a good chance of taking them out (with either incinerators or psycannons) and they're too close to the enemy vehicles for effective return fire unless your opponent really starts moving things to react.